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