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