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)(11,16)(12,14)(13,15)(19,28)(21,30)(24,32)(26,29) involution — undirected(1,3)(2,5)(4,8)(6,7)(17,18)(19,29)(20,25)(21,24)(22,27)(23,31)(26,28)(30,32) involution — undirected(9,11,13,12)(10,14,15,16)(17,19,20,30,22,28,23,21)(18,24,31,26,27,32,25,29)(2,6)(5,7)(17,20,22,23)(18,25,27,31)(19,30,28,21)(24,29,32,26)(3,8)(5,7)(9,12,13,11)(10,14,15,16)(17,21,23,28,22,30,20,19)(18,26,25,24,27,29,31,32)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.