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