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