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