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