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