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