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)(11,13)(12,14)(15,16)(19,25)(20,28)(22,29)(24,30)(26,31)(27,32) involution — undirected(2,5)(6,8)(9,11,14,16,15,12,13,10)(17,18)(19,26)(20,24)(21,23)(22,27)(25,31)(28,30)(29,32)(17,19,20,25,21,27,28,32)(18,22,24,29,23,26,30,31)(1,3,4,7)(2,6,5,8)(9,12,13,16,15,11,14,10)(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.