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)(19,28)(20,30)(21,27)(22,24)(23,25)(26,31)(29,32)(33,34,38,41)(35,39,44,47)(36,37,45,40)(42,43,48,46)(1,2,6,3)(4,9,12,7)(5,8,13,10)(11,15,16,14)(17,19,23,22)(18,24,25,28)(20,29,31,27)(21,26,32,30)(33,35,38,44)(34,39,41,47)(36,42,45,48)(37,43,40,46)(2,3)(7,9)(8,10)(14,15)(18,25)(20,31)(24,28)(27,29)(33,36,38,45)(34,40,41,37)(35,42,44,48)(39,46,47,43)(1,3,6,2)(4,9,12,7)(5,10,13,8)(11,15,16,14)(17,20)(18,26)(19,29)(21,28)(22,27)(23,31)(24,32)(25,30)(33,36)(34,37)(35,42)(38,45)(39,43)(40,41)(44,48)(46,47)(1,4)(2,7)(3,9)(5,11)(6,12)(8,14)(10,15)(13,16)(17,21,23,32)(18,27,25,29)(19,30,22,26)(20,24,31,28)(33,35)(34,39)(36,42)(37,43)(38,44)(40,46)(41,47)(45,48)(1,5,6,13)(2,8,3,10)(4,11,12,16)(7,14,9,15)(17,22,23,19)(18,28,25,24)(20,27,31,29)(21,30,32,26)(33,37)(34,36)(35,43)(38,40)(39,42)(41,45)(44,46)(47,48)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.