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)(33,34,39,43)(35,42,46,40)(36,38,37,41)(44,45,47,48)(1,2,6,4)(3,9,11,7)(5,12,13,8)(10,14,16,15)(33,35)(34,40)(36,47)(37,44)(38,45)(39,46)(41,48)(42,43)(2,4)(7,9)(8,12)(14,15)(17,19)(18,20)(21,27)(22,24)(23,26)(25,28)(29,31)(30,32)(33,36,39,37)(34,41,43,38)(35,44,46,47)(40,45,42,48)(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)(33,37,39,36)(34,38,43,41)(35,44,46,47)(40,45,42,48)(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)(33,35)(34,42)(36,44)(37,47)(38,45)(39,46)(40,43)(41,48)(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)(34,36)(35,45)(37,43)(39,41)(40,47)(42,44)(46,48)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.