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