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