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