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