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