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