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