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