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