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