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