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