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