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