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