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