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