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