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