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