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