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