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