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