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