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