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