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