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