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