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