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