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