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