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