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