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