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