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