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