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