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