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