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