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