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