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