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