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