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