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