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