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