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