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