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