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