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