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