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