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