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