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)(17,18,22,25)(19,26,30,32)(20,24,29,31)(21,28,23,27)(1,2)(3,4)(9,11,13,12)(10,14,15,16)(17,19,23,29,22,30,21,20)(18,24,28,32,25,31,27,26)(2,4)(9,12,13,11)(10,14,15,16)(18,25)(19,29)(20,30)(21,23)(24,26)(31,32)(6,8)(17,20,23,19,22,29,21,30)(18,26,28,24,25,32,27,31)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.