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