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)(19,27)(20,31)(21,26)(22,24)(23,30)(25,29)(28,32)(1,3,6,8)(2,7,5,4)(9,10)(11,14)(12,15)(13,16)(17,19)(18,23)(20,28)(21,29)(22,30)(24,27)(25,32)(26,31)(1,4)(2,8)(3,5)(6,7)(9,11,13,12)(10,14,16,15)(18,24)(23,27)(25,31)(26,32)(1,4)(2,3)(5,8)(6,7)(17,18)(19,23)(20,25)(21,26)(22,24)(27,30)(28,32)(29,31) involution — undirected(1,5,6,2)(3,4,8,7)(9,12,13,11)(10,15,16,14)(17,20,22,29)(18,25,24,31)(19,28,30,21)(23,32,27,26)(1,4)(2,8)(3,5)(6,7)(17,21,22,28)(18,26,24,32)(19,29,30,20)(23,31,27,25)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.