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