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