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