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