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