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