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