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