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