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