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