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