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