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