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