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