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