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