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