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