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