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