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