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