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