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