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