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)(11,13)(12,14)(15,16)(18,23)(24,26)(25,31)(27,32)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,18)(19,27)(20,26)(21,23)(22,24)(25,28)(29,32)(30,31)(10,14)(13,16)(18,24)(20,22)(23,26)(25,27)(28,30)(31,32) involution — undirected(1,3,4,7)(2,6,5,8)(17,19,21,29)(18,25,23,31)(20,28,22,30)(24,27,26,32)(17,20,21,22)(18,24,23,26)(19,28,29,30)(25,27,31,32)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.