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