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