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