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