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