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