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