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