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