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