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