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