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