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