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