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