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