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