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