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