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