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)(11,16)(12,14)(13,15)(17,18)(19,29)(20,24)(21,28)(22,27)(23,31)(25,32)(26,30) involution — undirected(1,3)(2,5)(4,8)(6,7)(17,19)(18,23)(20,32)(21,30)(22,31)(24,28)(25,26)(27,29) involution — undirected(9,11,13,12)(10,14,15,16)(17,20,32,19,22,30,21,31)(18,24,25,29,27,26,28,23)(2,6)(5,7)(17,21,22,32)(18,25,27,28)(19,30,31,20)(23,26,29,24)(3,8)(5,7)(9,12,13,11)(10,14,15,16)(17,20,21,31,22,30,32,19)(18,26,28,29,27,24,25,23)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.