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