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