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