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