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