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