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