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