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