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)(17,18,21,23)(19,25,27,22)(20,24,29,31)(26,32,28,30)(33,34,40,39)(35,43,37,41)(36,42,47,46)(38,44,45,48)(1,3,7,12)(2,8,9,11)(4,5,14,15)(6,10,13,16)(17,19)(18,22)(20,28)(21,27)(23,25)(24,32)(26,29)(30,31)(33,35,40,37)(34,41,39,43)(36,45,47,38)(42,44,46,48)(2,9)(3,12)(4,14)(10,16)(18,23)(22,25)(24,31)(30,32)(33,36,40,47)(34,42,39,46)(35,45,37,38)(41,44,43,48)(1,4)(2,6)(3,5)(7,14)(8,10)(9,13)(11,16)(12,15)(17,18)(19,22)(20,24)(21,23)(25,27)(26,30)(28,32)(29,31)(33,37,40,35)(34,43,39,41)(36,38,47,45)(42,48,46,44)(1,5)(2,10)(3,4)(6,8)(7,15)(9,16)(11,13)(12,14)(17,20,21,29)(18,24,23,31)(19,26,27,28)(22,30,25,32)(33,38)(34,44)(35,36)(37,47)(39,48)(40,45)(41,46)(42,43)(1,6)(2,4)(3,10)(5,8)(7,13)(9,14)(11,15)(12,16)(17,19)(18,22)(20,28)(21,27)(23,25)(24,32)(26,29)(30,31)(33,39,40,34)(35,43,37,41)(36,46,47,42)(38,44,45,48)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.