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)(11,13)(12,16)(14,15)(17,18)(19,23)(20,24)(21,27)(22,25)(26,29)(28,31)(30,32)(33,34,40,38)(35,37,41,36)(39,46,47,42)(43,44,48,45)(2,7)(3,9)(10,15)(11,16)(17,19,22,27)(18,23,25,21)(20,26,30,28)(24,29,32,31)(33,35)(34,36)(37,38)(39,43)(40,41)(42,44)(45,46)(47,48)(17,19)(18,21)(20,26)(22,27)(23,25)(24,31)(28,30)(29,32)(33,36,40,37)(34,41,38,35)(39,44,47,45)(42,48,46,43)(1,3,6,9)(2,8,7,4)(5,11,14,16)(10,13,15,12)(17,19)(18,21)(20,28)(22,27)(23,25)(24,29)(26,30)(31,32)(33,37,40,36)(34,41,38,35)(39,45,47,44)(42,48,46,43)(1,4,6,8)(2,9,7,3)(5,13,14,12)(10,11,15,16)(17,20)(18,24)(19,26)(21,31)(22,30)(23,29)(25,32)(27,28)(33,38,40,34)(35,37,41,36)(39,42,47,46)(43,44,48,45)(1,5,6,14)(2,10,7,15)(3,11,9,16)(4,12,8,13)(17,21)(18,19)(20,29)(22,23)(24,28)(25,27)(26,32)(30,31)(33,39)(34,42)(35,43)(36,44)(37,45)(38,46)(40,47)(41,48)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.