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