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