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