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