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