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