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