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