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