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