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