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