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