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