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