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