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