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