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