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