One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(3,7)(9,10,13,16)(11,17,19,14)(12,20,21,15)(18,22,24,23)(25,26)(27,28)(29,32)(30,36)(31,33)(34,35)(37,39)(38,40)(1,2,4,5)(3,6,7,8)(9,11,13,19)(10,14,16,17)(12,18,21,24)(15,22,20,23)(25,27,31,30)(26,28,33,36)(29,34,38,39)(32,35,40,37)(2,5)(6,8)(12,21)(15,20)(18,24)(22,23)(25,28,27,26,31,36,30,33)(29,37,34,40,38,35,39,32)(1,3,4,7)(2,6,5,8)(9,12,13,21)(10,15,16,20)(11,18,19,24)(14,22,17,23)(25,29,31,38)(26,32,33,40)(27,34,30,39)(28,35,36,37)(11,19)(14,17)(18,24)(22,23)(29,38)(32,40)(34,39)(35,37) involution — undirectedA 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.