One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(9,10,13,12)(11,14,16,15)(17,18,24,28)(19,20,30,32)(21,27,23,26)(22,31,29,25)(1,3,4,8)(2,5,6,7)(9,11)(10,14)(12,15)(13,16)(17,19,23,29,24,30,21,22)(18,25,27,20,28,31,26,32)(2,6)(3,8)(9,12,13,10)(11,15,16,14)(17,20)(18,19)(21,25)(22,26)(23,31)(24,32)(27,29)(28,30)(2,6)(3,8)(11,16)(14,15)(17,21,24,23)(18,26,28,27)(19,29,30,22)(20,31,32,25)(2,6)(5,7)(17,22,23,19,24,29,21,30)(18,20,27,31,28,32,26,25)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.