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