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