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