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