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