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