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