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