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)(13,14,16,15)(17,18,22,25)(19,23,26,30)(20,21,24,29)(27,28,31,32)(33,34,40,38)(35,39,43,41)(36,42,37,47)(44,46,45,48)(2,7)(3,12)(4,10)(14,15)(17,19,22,26)(18,23,25,30)(20,27,24,31)(21,28,29,32)(33,35,40,43)(34,41,38,39)(36,44,37,45)(42,48,47,46)(2,7)(4,10)(8,11)(13,16)(19,26)(23,30)(27,31)(28,32)(33,36,40,37)(34,42,38,47)(35,44,43,45)(39,46,41,48)(1,3)(2,8)(4,13)(5,15)(6,12)(7,11)(9,14)(10,16)(17,20)(18,21)(19,27)(22,24)(23,28)(25,29)(26,31)(30,32)(33,37,40,36)(34,42,38,47)(35,45,43,44)(39,46,41,48)(1,4,6,10)(2,9,7,5)(3,13,12,16)(8,14,11,15)(17,19)(18,23)(20,27)(21,28)(22,26)(24,31)(25,30)(29,32)(33,38,40,34)(35,41,43,39)(36,42,37,47)(44,46,45,48)(1,5,6,9)(2,10,7,4)(3,14,12,15)(8,13,11,16)(17,21)(18,24)(19,28)(20,25)(22,29)(23,31)(26,32)(27,30)(33,39,40,41)(34,43,38,35)(36,46,37,48)(42,45,47,44)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.