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