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