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