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