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