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