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