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