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