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