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