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