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