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