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