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