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