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