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