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