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)(12,16)(13,14)(17,18)(19,24)(20,22)(21,23)(25,26)(27,32)(28,29)(30,31) involution — undirected(10,14)(11,16)(17,19,22,21)(18,23,20,24)(26,31)(27,28)(2,5)(6,8)(10,14)(11,16)(18,20)(23,24)(25,27,30,28)(26,32,31,29)(1,2)(3,6)(4,5)(7,8)(9,11,13,16)(10,15,14,12)(17,20,22,18)(19,23,21,24)(25,28,30,27)(26,29,31,32)(1,3,4,7)(2,6,5,8)(9,12,13,15)(10,16,14,11)(17,21,22,19)(18,23,20,24)(25,29)(26,27)(28,31)(30,32)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.