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