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