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