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