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