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