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