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