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