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