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