The Com Guards simply paint their vehicles white for official occasions and use appropriate camouflage for combat.
Per FM: ComStar, page 17.
Exterminator, Battle of Tukayyid (p 178)
Phoenix Hawk, Battle of Tukayyid (161, back cover)
The insignia of the Third Army shows a hooded green falcon perched on a black gauntlet. Per FM: ComStar, page 24.