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