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