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