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