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