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)(11,12)(14,16)(17,18,23,20)(19,26,29,32)(21,25,22,30)(24,31,27,28)(1,3,4,12,6,14,5,13)(2,7,15,16,9,11,8,10)(17,19)(18,24)(20,27)(21,28)(22,31)(23,29)(25,32)(26,30) involution — undirected(1,2)(3,11)(4,15)(5,8)(6,9)(7,14)(10,12)(13,16)(17,20,23,18)(19,27,29,24)(21,25,22,30)(26,28,32,31)(1,4,6,5)(2,8,9,15)(3,12,14,13)(7,10,11,16)(17,21,23,22)(18,25,20,30)(19,28,29,31)(24,32,27,26)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.