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