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