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