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