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