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