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