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