Green = Rudder
Blue = Keel
Pink = Ammo Bunker
Yellow = Engine Room
Orange = Fuel Bunker

There is no such chart for GWX.

The chart no longer specifically applies in GWX. More accurately, the critical locations (engine rooms, fuel bunkers etc.) still exist and can cause more damage, but their locations no longer exactly apply.

This is from a previous post I'd made on the subject:

The new GWX ships never had the boxes indicating their critical locations accurately placed (designers just copied the boxes from old ships over to the new ones). Since GWX changed the compartments around on the original ships, the boxes indicating their location may or may not be accurate as well.
Just keep in mind that it is no longer completely accurate and only gives a general guideline.

You can get better information from these two threads, discussing the best locations to target on ships:

http://www.subsim.com/radioroom/showthread.php?t=104045

http://www.subsim.com/radioroom/showthread.php?t=103928