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