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