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