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