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