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