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