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