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