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