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