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