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