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