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