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