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