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