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