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