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