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