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