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)(11,13)(12,14)(15,16)(17,18,21,22)(19,23,27,24)(20,25,29,30)(26,28,32,31)(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(17,19,21,27)(18,23,22,24)(20,28,29,31)(25,32,30,26)(10,14)(11,15)(17,19)(18,24)(20,26)(21,27)(22,23)(25,31)(28,30)(29,32) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,16)(17,20,22,30,21,29,18,25)(19,26,23,28,27,32,24,31)(2,5)(6,8)(17,18,21,22)(19,23,27,24)(20,25,29,30)(26,28,32,31)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.