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