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)(17,18,24,28)(19,22,27,23)(20,26,31,29)(21,32,30,25)(1,3,5,4)(2,6,8,7)(9,11)(10,14)(12,15)(13,16)(17,19)(18,22)(20,25)(21,26)(23,28)(24,27)(29,30)(31,32)(1,3,5,4)(2,7,8,6)(9,12,13,10)(11,15,16,14)(17,20,23,30,24,31,22,21)(18,25,27,26,28,32,19,29)(1,3,5,4)(2,7,8,6)(11,16)(14,15)(17,21,22,31,24,30,23,20)(18,26,19,25,28,29,27,32)(1,4,5,3)(2,7,8,6)(17,22,24,23)(18,27,28,19)(20,21,31,30)(25,26,32,29)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.