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