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