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