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