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