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