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