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