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