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