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