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