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