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