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