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