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