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)(11,16,15,12)(17,18,20,22)(19,23,24,21)(27,31)(30,32)(10,14)(11,15)(17,18,20,22)(19,21,24,23)(26,29)(30,32)(10,14)(12,16)(17,18)(19,21)(20,22)(23,24)(25,26)(27,30)(28,29)(31,32) involution — undirected(1,2)(3,5)(4,6)(7,8)(9,11,13,15)(10,12,14,16)(17,18)(19,21)(20,22)(23,24)(1,3,4,7)(2,5,6,8)(9,12)(10,15)(11,14)(13,16)(17,19,20,24)(18,21,22,23)(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.