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