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