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