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