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