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)(17,18,22,26,21,25,35,42)(19,27,30,43,29,23,36,38)(20,31,34,45,33,24,39,41)(28,37,44,47,32,40,46,48)(1,3)(2,5)(4,8)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19)(18,23)(20,28)(21,29)(22,30)(24,37)(25,27)(26,38)(31,40)(32,33)(34,44)(35,36)(39,46)(41,47)(42,43)(45,48) involution — undirected(10,14)(11,15)(17,20,22,34,21,33,35,39)(18,24,26,41,25,31,42,45)(19,28,30,44,29,32,36,46)(23,37,38,47,27,40,43,48)(3,8)(5,7)(10,14)(13,16)(17,19)(18,23)(20,32)(21,29)(22,30)(24,40)(25,27)(26,38)(28,33)(31,37)(34,46)(35,36)(39,44)(41,48)(42,43)(45,47) involution — undirected(2,6)(5,7)(19,29)(23,27)(28,32)(30,36)(37,40)(38,43)(44,46)(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.