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