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