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