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