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