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