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