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