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