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