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