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