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