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