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