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