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)(11,13)(12,14)(15,16)(17,18,22,25,23,26,21,31)(19,27,20,30,28,32,29,24)(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,21)(22,29)(23,28)(25,32)(26,30)(27,31) involution — undirected(2,6)(5,7)(9,11,12,16)(10,13,14,15)(19,28)(20,29)(24,30)(27,32)(3,8)(5,7)(11,16)(13,15)(17,20,21,19,23,29,22,28)(18,24,31,32,26,30,25,27)(10,14)(13,15)(17,21,23,22)(18,25,26,31)(19,29,28,20)(24,27,30,32)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.