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