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