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