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