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