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