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