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