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