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