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