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