This Graves build is what I like to use in my games, it is different from most Graves builds in that it goes 100% crit. While this is cheesy on most champions, the damage output from this build makes it amazingly strong on Graves, especially late game.

Pros: Amazing burst
Strong through most of the game
Massive DPS and carry potential late game
Can go aggro early/mid or just farm up till late, both work on Graves thanks to the mix of ability and auto attack damage

Cons: Low range (can be harassed by many popular picks like Cait)
Late game, it is very helpful to go balls deep to get your max amount of DPS, meaning you need reliable initiation/ peel