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