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