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)(11,16)(12,14)(13,15)(17,18)(19,24)(20,21)(22,23)(26,27)(28,32) involution — undirected(2,5)(3,8)(9,11,13,12)(10,14,15,16)(17,19)(18,21)(20,22)(23,24)(26,27)(30,31)(2,5)(6,7)(11,12)(14,16)(18,23)(19,20)(25,26,29,27)(28,30,32,31)(1,2)(3,6)(4,5)(7,8)(9,12,13,11)(10,14,15,16)(17,20,22,19)(18,24,23,21)(25,27,29,26)(28,31,32,30)(1,3,4,8)(2,6,5,7)(9,10)(11,16)(12,14)(13,15)(17,21,22,24)(18,19,23,20)(25,28)(26,30)(27,31)(29,32)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.