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