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