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