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