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