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