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