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