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