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)(17,18,22,24,23,28,21,27)(19,25,20,31,30,32,29,26)(1,2)(3,4)(9,11,12,16)(10,13,14,15)(18,24)(19,20)(21,22)(25,32)(27,28)(29,30)(2,4)(10,14)(13,15)(17,19,21,29,23,30,22,20)(18,25,27,26,28,32,24,31)(6,8)(11,16)(13,15)(17,20,21,19,23,29,22,30)(18,26,27,32,28,31,24,25)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.