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