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