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