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