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