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