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