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