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