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