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