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