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