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