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