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