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