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