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