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