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