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