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