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