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