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