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