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