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