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