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