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