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