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