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