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