One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,5,7,8)(9,10,14,16)(11,13,15,12)(17,18,24,28)(19,29,31,25)(20,22,21,26)(23,27,32,30)(9,11,14,15)(10,12,16,13)(17,19)(18,25)(20,27)(21,30)(22,23)(24,31)(26,32)(28,29)(1,2)(3,5)(4,6)(7,8)(9,10)(11,12)(13,15)(14,16)(17,20,24,21)(18,26,28,22)(19,30,31,27)(23,29,32,25)(9,12,14,13)(10,11,16,15)(17,21,24,20)(18,26,28,22)(19,30,31,27)(23,25,32,29)(9,12,14,13)(10,11,16,15)(17,22,24,26)(18,21,28,20)(19,23,31,32)(25,30,29,27)(1,3,4,7)(2,5,6,8)(9,13,14,12)(10,15,16,11)(17,23)(18,27)(19,26)(20,29)(21,25)(22,31)(24,32)(28,30)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.