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