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