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