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