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