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