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)(19,27)(20,26)(21,24)(22,28)(23,25)(29,31)(30,32)(33,34,38,43)(35,41,44,39)(36,40,45,46)(37,42,47,48)(1,2)(3,6)(4,7)(5,8)(9,12)(10,14)(11,15)(13,16)(17,19,23,21)(18,24,25,27)(20,30,31,28)(22,29,32,26)(33,35)(34,39)(36,42)(37,40)(38,44)(41,43)(45,48)(46,47)(2,3)(7,9)(8,10)(15,16)(18,25)(20,31)(24,27)(28,30)(33,36,38,45)(34,40,43,46)(35,42,44,48)(37,41,47,39)(1,3,6,2)(4,9,12,7)(5,8,14,10)(11,15,13,16)(17,20)(18,26)(19,28)(21,30)(22,27)(23,31)(24,32)(25,29)(33,36)(34,40)(35,42)(37,39)(38,45)(41,47)(43,46)(44,48)(1,4,6,12)(2,7,3,9)(5,13,14,11)(8,16,10,15)(17,21,23,19)(18,27,25,24)(20,30,31,28)(22,29,32,26)(33,35)(34,41)(36,42)(37,46)(38,44)(39,43)(40,47)(45,48)(1,5,6,14)(2,8,3,10)(4,11,12,13)(7,15,9,16)(17,22)(18,28)(19,29)(20,24)(21,26)(23,32)(25,30)(27,31)(33,37,38,47)(34,42,43,48)(35,40,44,46)(36,41,45,39)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.