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