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