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