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