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