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