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