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