One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(9,10,13,15)(11,12,16,14)(17,18)(19,25)(20,24)(21,22)(23,26)(27,32)(28,30)(29,31)(5,6,7,8)(11,16)(12,14)(18,22)(19,26)(24,28)(27,29)(5,6)(7,8)(9,11)(10,14)(12,15)(13,16)(17,18)(19,23)(20,28)(21,22)(24,30)(25,26)(27,32)(29,31) involution — undirected(1,2)(3,4)(17,19,21,26)(18,23,22,25)(20,29,30,27)(24,32,28,31)(9,12,13,14)(10,11,15,16)(17,20)(18,24)(19,27)(21,30)(22,28)(23,31)(25,32)(26,29)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.