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