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