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