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