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