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