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