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