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