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