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