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