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