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