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