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