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