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