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