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