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