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