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