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