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