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