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