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