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