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