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