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