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