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