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