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