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