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