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)(18,21)(19,25)(20,28)(30,32)(6,8)(17,18,22,21)(19,23,25,27)(20,24,28,29)(26,30,31,32)(5,6,7,8)(9,10)(11,13)(12,14)(15,16)(17,19)(18,23)(20,26)(21,27)(22,25)(24,30)(28,31)(29,32)(1,2)(3,4)(9,10)(11,13)(12,14)(15,16)(17,20)(18,24)(19,26)(21,29)(22,28)(23,30)(25,31)(27,32) involution — undirected(9,11,12,16)(10,13,14,15)(17,21,22,18)(19,27,25,23)(20,24,28,29)(26,30,31,32)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.