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