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