Well, this huild is a carry oddtank build for Graves.
First you have to know, that graves actually is a range-ad-carry and very easy to kill.
The best solution to survive a teamfight or a 1vs1, is to buy a tank item like warmongs with Atmas (Atmongs) !
warmongs is the best item for champs like graves, who farm a lot !
so the first item have to be warmongs

items !
1) you start with regrowth pendant and a heath pot
2) you buy b´ruby cristal
3) you buy dorans blade for lifesteal, health and attk dmg
4) now you buy Giants Bett which will give lot of life
5) buy warmongs ! and boots attk speed boots

3. item !
1) B.v sword, and dagger
2) buy zeal and Cloak of Agility
3) buy Chain vest and then Atmas

4. item
1) finish phantome dancer
2) and now buy pickaxe
and finish infinity blade

5. item
1) buy B.V sword again and finish bloodthirster

6. item
1) now you sale youre dorans blade and buy something like Madreds bloodrazer
or something else

thx for reading ;)