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