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