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