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