One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,13)(12,14)(15,16)(17,18,23,28)(19,24,22,27)(20,31,34,39)(21,26,37,43)(25,29,41,32)(30,38,36,44)(33,47,35,48)(40,45,42,46)(2,5)(3,7)(9,10)(11,15)(12,14)(13,16)(17,19,23,22)(18,24,28,27)(20,32,34,29)(21,30,37,36)(25,39,41,31)(26,38,43,44)(33,46,35,45)(40,48,42,47)(9,11)(10,13)(12,16)(14,15)(17,20,19,29,23,34,22,32)(18,25,27,39,28,41,24,31)(21,35,30,46,37,33,36,45)(26,42,44,47,43,40,38,48)(1,3,4,7)(2,6,5,8)(11,16)(13,15)(17,21)(18,26)(19,30)(20,33)(22,36)(23,37)(24,38)(25,40)(27,44)(28,43)(29,45)(31,47)(32,46)(34,35)(39,48)(41,42)(10,14)(13,15)(17,19,23,22)(18,27,28,24)(20,29,34,32)(21,36,37,30)(25,39,41,31)(26,38,43,44)(33,46,35,45)(40,47,42,48)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.