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