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