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