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