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