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