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