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