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