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