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