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