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