You can either start from your own blue or red ( i like to start where i can get the help from your bot duo for a better pull ) , you are quite fast at jungling so before directing to the other buff you can take a break doing wolves/wraiths .
Then with the smite not longer on cooldown you can safely approach the other buff ( you will have to use a total of 2 ( or 3 if u can't autoattack properly the jungle creeps ) pots before the buff ) .
Finish the route and you can base and buy madred and boots 1 ( if u can get a kill an early mobi boots are great to get fast map vision ) with maybe a pink ward .

In this phase of the game it's dangerous going alone with less than 70 % hp ( cause you are not tanky ( a doran blade is not a bad item if you feel it can help you ) , so be sure to have 2 pots and a good vision .
Remember aatrox has a great countergank system with the aoe knockup and the ulti and remeber also that YOU HAVE TO DIVE enemies , taking advantage of your passive .. Aatrox is also a good skirmisher and can do great in a 2 vs 2 / 3 vs 3 scenario .

In this phase you have to farm quite a bit to have the feral flare asap !

If you are understanding the champion you will be ahead of the enemy jungler cause you are a very fast jungle (and wave) clearer , but remember that a tanky aatrox is nearly always better than a blind dumb full dmg aatrox , so try to have giants belt even before finishing the botrk ( if possible ) .
In the late game your goal is obviously to take down the enemy adc , don't be scared to jump on a grouped team ( be sure your team will follow you :P )!! YOU WILL HAVE YOUR PASSIVE and this will cause chaos in the enemy lineup , dividing their team !
Use wisely your w from lifestealer to damage dealer and you will cause many troubles !