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