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