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