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