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