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