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