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