You need to change the vehicle skin, for each of Onrush's 8 vehicle classes. Good news, this trophy can be earned after completing the tutorial introduction race. The game starts you off with two skins for each vehicle.
From the Main Menu, select
Personalize then
Vehicles. Select a vehicle by pressing
. Change its skin from the list and equip with
. Repeat the process for the other seven classes to earn the trophy.