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