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