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