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