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