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