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)(19,24,28,32)(20,25,21,23)(27,30,29,31)(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,16)(13,14) involution — undirected(10,14)(15,16)(18,23)(20,21)(24,30)(25,26)(27,29)(31,32) involution — undirected(2,6)(5,7)(9,11,13,12)(10,15,14,16)(17,19,22,28)(18,24,26,32)(20,29,21,27)(23,30,25,31)(3,8)(5,7)(9,12,13,11)(10,15,14,16)(17,20,22,21)(18,25,26,23)(19,27,28,29)(24,30,32,31)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.