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