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