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