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