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