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