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)(11,13)(12,14)(15,16)(18,22)(23,25)(24,28)(30,31)(9,11)(10,13)(12,16)(14,15)(17,18,21,22)(19,23,27,25)(20,24,29,28)(26,30,32,31)(2,3)(10,12)(11,15)(17,18)(19,25)(20,28)(21,22)(23,27)(24,29)(26,30)(31,32) involution — undirected(1,3,4,2)(5,6)(7,8)(9,12,14,10)(11,16,15,13)(17,19,21,27)(18,23,22,25)(20,26,29,32)(24,30,28,31)(9,13,14,16)(10,15,12,11)(17,20)(18,24)(19,26)(21,29)(22,28)(23,30)(25,31)(27,32)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.