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