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