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