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