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