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