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