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