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