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