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