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