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