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