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