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