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