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