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)(19,23)(20,22)(21,24)(25,27)(26,31)(28,30)(29,32)(33,34,39,36)(35,40,43,37)(38,41,46,44)(42,47,48,45)(1,2,6,3)(4,9,11,7)(5,8,13,10)(12,15,16,14)(17,18)(19,25)(20,22)(21,24)(23,27)(26,32)(28,30)(29,31)(33,35)(34,40)(36,37)(38,42)(39,43)(41,47)(44,45)(46,48)(4,11)(7,9)(12,16)(14,15)(18,20)(23,25)(24,28)(31,32)(33,34,39,36)(35,37,43,40)(38,41,46,44)(42,45,48,47)(1,3,6,2)(4,9,11,7)(5,8,13,10)(12,14,16,15)(17,19)(18,23)(20,25)(21,29)(22,27)(24,32)(26,30)(28,31)(33,36,39,34)(35,37,43,40)(38,41,46,44)(42,47,48,45)(1,4)(2,7)(3,9)(5,12)(6,11)(8,14)(10,15)(13,16)(17,20,22,18)(19,25,27,23)(21,28,30,24)(26,32,29,31)(33,37)(34,35)(36,43)(38,45)(39,40)(41,42)(44,48)(46,47)(1,5,6,13)(2,8,3,10)(4,12,11,16)(7,14,9,15)(17,21,22,30)(18,24,20,28)(19,26,27,29)(23,31,25,32)(33,38,39,46)(34,41,36,44)(35,42,43,48)(37,45,40,47)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.