The runes need to change.
You should have full ad marks and quints with seal of armor and glyph of magic resist or health.
In addition to the faulty runes, theres the problem of rushing BT.
Honestly I like BT, but it's not an item you rush early game. Its mainly to give you that mid-to-late game sustain. A Stattik Shiv+ IE gives you the dmg, attack speed, and crit chance. And when graves crits, it deals a lot of damage. This will help in laning phase. BT is basically for when you want to roam.

You should change your runes a lot, instead of mark of armor penetration take full ad marks.

If you're going to take seals/glyphs of attack speed, it's better to take Greater Glyph of Attack Speed as opposed to Seal of Attack Speed since you'll constantly be trading with the enemy adc and the only magic damage you'll be taking is from the support who's damage falls off, but even so keep a few Greater Glyph of Magic Resist (except for corki who does a lot of magic damage so you should take full)

You should never rush Bloodthirster over Infinity Edge

Get Statikk Shiv as your 2nd item, as you need the attack speed and the crit chance which synergizes with you Infinity Edge

Never start long sword, always start Doran's Blade

You should get a defensive item, or at least Mercurial Scimitar Frozen Mallet or even a Phantom Dancer or Youmuu's Ghostblade instead of both Bloodthirster and Blade of the Ruined King

Take Dangerous Game

Should lengthen the guide and include matchups

Seal of Health or Seal of Scaling Health Work better on graves than armor because of his passive.

I have edited the name and made some tweaks, later on I will add a safer build. Which will have IE as rush and some defense.

Thank you for sharing your thoughts. Don't worry though, I usually rush IE on adc's, but I find BT to work better on Graves. And I get the Crit chance from IE with cloak, which I buy as preparation. I'll edit it though I think.

Bloodthirster is not a good item to rush. It should be built 4th or even 5th depending on the amount of armor the enemy has.

The early item combination should be Infinity Edge plu Statikk Shiv because SS synergizes pretty well with IE and grants you an immense power spike. Bloodthirster isn't a bad choice either but should be bought as the third major item JUST in case Last Whisper isn't already needed. In lieu of BorK you should consider defense items like Banshee's Veil/ Mercurial Scimitar or Guardian Angel.

Enchanted Armor is mathematically proven **** and Juggernaut > Resistance .

Pros and Cons are better placed right after the introduction to provide the viewer a first glance at the champion.

Expand content! [[Graves]] and [icon=Graves size=50] are some standard BBCodes, there are also guides you can check out: BBCode Guide and Making A Guide