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