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