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