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