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