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