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