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)(11,15)(12,14)(13,16)(17,18,22,25)(19,23,21,30)(20,27,28,32)(24,26,31,29)(2,5)(3,7)(9,11)(10,13)(12,16)(14,15)(17,19,22,21)(18,23,25,30)(20,26,28,29)(24,27,31,32)(11,16)(13,15)(17,20,21,29,22,28,19,26)(18,24,23,27,25,31,30,32)(2,5)(6,8)(10,14)(13,15) involution — undirected(1,3,4,7)(2,6,5,8)(20,28)(24,31)(26,29)(27,32)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.