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