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)(18,22)(19,24)(26,28)(27,31) involution — undirected(2,6)(4,7)(9,11,14,13)(10,15,12,16)(17,18,21,22)(19,23,24,20)(27,31)(30,32)(2,6)(4,7)(9,10,14,12)(11,16,13,15)(17,19)(18,23)(20,22)(21,24)(25,26,29,28)(27,30,31,32)(1,3)(2,7)(4,6)(5,8)(9,12,14,10)(11,15,13,16)(17,19)(18,23)(20,22)(21,24)(25,27)(26,30)(28,32)(29,31)(1,4,5,7)(2,8,6,3)(9,13,14,11)(10,15,12,16)(17,20,21,23)(18,24,22,19)(25,28,29,26)(27,32,31,30)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.