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