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