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