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