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