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)(17,18,21,25,22,26,27,30)(19,23,28,31,20,24,29,32)(9,11,14,10)(12,16,13,15)(17,19,21,28,22,20,27,29)(18,23,25,31,26,24,30,32)(2,5)(6,8)(9,12,14,13)(10,15,11,16)(17,20,21,29,22,19,27,28)(18,24,25,32,26,23,30,31)(9,12,14,13)(10,16,11,15)(19,20)(23,24)(28,29)(31,32)(1,3,4,7)(2,6,5,8)(9,13,14,12)(10,16,11,15)(19,20)(23,24)(28,29)(31,32)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.