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