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