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)(11,14)(12,16)(13,15)(19,23)(21,24)(25,26)(27,28)(29,32)(30,31)(9,11,13,16)(10,14,15,12)(17,18,20,22)(19,21,23,24)(25,27)(26,30)(28,32)(29,31)(9,11)(10,12)(13,16)(14,15)(17,19)(18,21)(20,23)(22,24)(25,28,29,30)(26,31,32,27)(1,2)(3,5)(4,6)(7,8)(9,11)(10,12)(13,16)(14,15)(17,18)(19,21)(20,22)(23,24)(25,27)(26,28)(29,31)(30,32) involution — undirected(1,3,4,7)(2,5,6,8)(9,12)(10,11)(13,14)(15,16)(17,19)(18,21)(20,23)(22,24)(25,28)(26,31)(27,32)(29,30)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.