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