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