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