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