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