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)(17,18,21,25,22,26,29,32)(19,23,20,24,27,30,28,31)(1,2)(3,6)(4,5)(7,8)(9,10)(11,14)(12,13)(15,16) involution — undirected(10,13)(14,15)(17,19,21,20,22,27,29,28)(18,23,25,24,26,30,32,31)(2,5)(6,8)(9,11,12,16)(10,14,13,15)(1,3,4,7)(2,6,5,8)(17,20,21,27,22,28,29,19)(18,24,25,30,26,31,32,23)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.