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