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