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)(17,18,24,30)(19,28,26,20)(21,29,23,27)(22,32,31,25)(1,3,4,8)(2,5,6,7)(9,11)(10,14)(12,15)(13,16)(17,19,21,22,24,26,23,31)(18,25,27,20,30,32,29,28)(2,6)(3,8)(9,12,13,10)(11,15,16,14)(17,20,24,28)(18,26,30,19)(21,32,23,25)(22,27,31,29)(2,6)(3,8)(11,16)(14,15)(17,21,24,23)(18,27,30,29)(19,31,26,22)(20,25,28,32)(2,6)(5,7)(17,22,23,19,24,31,21,26)(18,28,29,32,30,20,27,25)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.