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