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