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