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