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