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