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