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