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