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