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