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