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