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