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