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