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